WhatDate
When is it? Festival & holiday dates, sourced and free
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WhatDate answers "When is...?" for festivals and holidays, with the source behind every date. • Reliable dates: each date comes with its source or logic - any differences become clear. • Regional dates: see when a day falls in your region or tradition, and why it moves each year. • Free calendar packs: festival, tithi, games/tournament and holiday sets asics for any calendar or the WhatDate app. • Private: no sign-up, no ads, no tracking. Every Date Matters. Because Everything Happens On A Date.
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More like this: all 57 launches in novelty calendar and milestone tracking apps →
PH · launched Oct 26, 2026 · 1 upvote (top 67%)
- Horizontal
- Search & retrieval
- B2C
- Not AI
- Hobby / open-source project
- Productivity
- Privacy
- Calendar
Similar launches
See all 320 similar launches →Could you build this?
Partial The site and calendar UI are easy, but accurate, sourced festival dates across lunar, religious and regional traditions need curated data and calendrical expertise that vibe coding won't supply.
What it would actually take: The front end is a simple date-lookup site with a calendar export. The hard part is a verified, source-annotated dataset of movable festivals across Hijri, Hindu, Chinese, Hebrew and other calendars, plus region-specific rules. Building it well requires a researcher or calendrical specialist who can validate each rule against authoritative sources.
Competitors
Other products that read as similar to this one : 320 launches clear the similarity bar, closest 8 shown.
Attention rank: #128 of 321 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 300 days after the earliest competitor.
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Other launches for this product
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